// © Broadcom. All Rights Reserved.
// The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
// SPDX-License-Identifier: Apache-2.0

package view

import (
	"context"

	"github.com/vmware/govmomi/property"
	"github.com/vmware/govmomi/vim25"
	"github.com/vmware/govmomi/vim25/mo"
	"github.com/vmware/govmomi/vim25/types"
)

type ContainerView struct {
	ManagedObjectView
}

func NewContainerView(c *vim25.Client, ref types.ManagedObjectReference) *ContainerView {
	return &ContainerView{
		ManagedObjectView: *NewManagedObjectView(c, ref),
	}
}

// Retrieve populates dst as property.Collector.Retrieve does, for all entities in the view of types specified by kind.
func (v ContainerView) Retrieve(ctx context.Context, kind []string, ps []string, dst any, pspec ...types.PropertySpec) error {
	pc := property.DefaultCollector(v.Client())

	ospec := types.ObjectSpec{
		Obj:  v.Reference(),
		Skip: types.NewBool(true),
		SelectSet: []types.BaseSelectionSpec{
			&types.TraversalSpec{
				Type: v.Reference().Type,
				Path: "view",
			},
		},
	}

	if len(kind) == 0 {
		kind = []string{"ManagedEntity"}
	}

	for _, t := range kind {
		spec := types.PropertySpec{
			Type: t,
		}

		if len(ps) == 0 {
			spec.All = types.NewBool(true)
		} else {
			spec.PathSet = ps
		}

		pspec = append(pspec, spec)
	}

	req := types.RetrieveProperties{
		SpecSet: []types.PropertyFilterSpec{
			{
				ObjectSet: []types.ObjectSpec{ospec},
				PropSet:   pspec,
			},
		},
	}

	res, err := pc.RetrieveProperties(ctx, req)
	if err != nil {
		return err
	}

	if d, ok := dst.(*[]types.ObjectContent); ok {
		*d = res.Returnval
		return nil
	}

	return mo.LoadObjectContent(res.Returnval, dst)
}

// RetrieveWithFilter populates dst as Retrieve does, but only for entities matching the given filter.
func (v ContainerView) RetrieveWithFilter(ctx context.Context, kind []string, ps []string, dst any, filter property.Match) error {
	if len(filter) == 0 {
		return v.Retrieve(ctx, kind, ps, dst)
	}

	var content []types.ObjectContent

	err := v.Retrieve(ctx, kind, filter.Keys(), &content)
	if err != nil {
		return err
	}

	objs := filter.ObjectContent(content)

	pc := property.DefaultCollector(v.Client())

	return pc.Retrieve(ctx, objs, ps, dst)
}

// Find returns object references for entities of type kind, matching the given filter.
func (v ContainerView) Find(ctx context.Context, kind []string, filter property.Match) ([]types.ManagedObjectReference, error) {
	if len(filter) == 0 {
		// Ensure we have at least 1 filter to avoid retrieving all properties.
		filter = property.Match{"name": "*"}
	}

	var content []types.ObjectContent

	err := v.Retrieve(ctx, kind, filter.Keys(), &content)
	if err != nil {
		return nil, err
	}

	return filter.ObjectContent(content), nil
}

// FindAny returns object references for entities of type kind, matching any property the given filter.
func (v ContainerView) FindAny(ctx context.Context, kind []string, filter property.Match) ([]types.ManagedObjectReference, error) {
	if len(filter) == 0 {
		// Ensure we have at least 1 filter to avoid retrieving all properties.
		filter = property.Match{"name": "*"}
	}

	var content []types.ObjectContent

	err := v.Retrieve(ctx, kind, filter.Keys(), &content)
	if err != nil {
		return nil, err
	}

	return filter.AnyObjectContent(content), nil
}
